This work was supported by the Center for Low
Energy Systems Technology (LEAST), one of six centers
supported by the STARnet phase of the Focus Center Research
Program (FCRP), an SRC program sponsored by MARCO and DARPA.
It was also supported by the NSF ASSIST NERC award 1160483 and NSF awards 1205618 and 1213052. The authors would also like to thank Prof. Suman Datta and his group at Penn State University for his collaboration on TFET devices and  models used in this work.
